4S. Kasthurirengan, S. Jacob, R. Karunanithi, Upendra Behera, D. S. Nadig,Anand N. Bahuguni. Development of a Helium Compressor from a Reciprocating-type Refrigeration Compressor[ J]. Journal of Indian Institute of the Indian Institute of Science ,2006,86( 1 ) :69 -73.